Device for ripping open paper envelopes



June 2, 1936.

A. D. THIEME DEVICE FOR RIPPING OPEN PAPER ENVELOPES Filed NOV. 28, 1934H. D '77: 1'6 M6 /NVENTO/Z Patented June 2, 1936 NT' OFFlCE DEVICE FORRIPPING OPEN ENvELorEs Anna Dora Thieme, Hanover,

PAPER Germany, assigncr to the firm H. Bahlsens Keksi'abrlk A. (in,

Hanover, Germany Application November as, 1934, sci-mm.

. Germany November 29, 1933 1 Claim.

The known devices for ripping open the paper wrapping of cartons in theform of prisms, for example four-sided prisms, operate in such a mannerthat, on'the lid part or a stiff insertion between the' lid part and thewrapping being raised, the portion of the wrapping, which is above thelid part, can be ripped open, or that this portion of the wrapping,which is above the lid part, is adapted to be ripped open by meansincorporated in the wrapping. In ripping devices of the latter kindthreads sewn into the wrapping, known as rip' threads, were formerly ingeneral use. As a substitute for the rip threads it has been proposedtofold together the two place to be taken hold of for ripping thewrapping. This part need not necessarily be laid over the top edge ofthe frontwali of the carton, but may be disposed at any other place ofthe carton wrapping.

The provision of such a ripping fold..composed of strip-like parts ofthe wrapping paper forms the subject matter of the present invention.But, whilst in the known arrangement of this kind the marginal parts ofthe. wrapping paper were folded together, according to the presentinvention the ripping tab is formed from a transverse fold which ispicked up from the surface of the wrapping paper and is ripped. In thecourse of experiments it has been found, that in this way it is not'onlyfar easier to bring the ripping tab into the correct position, whenwrappingon the wrapping. paper, and to close the wrapping paper, butthat this way of arranging the ripping .tab can be effected. entirelywith the aid of amachine.

45 In the accompanying drawing an example of how the ripping tab may beformed according to theinvention Figured-is a plan view of the carton itplaced on the wrapping paper which is laid out ilat. mFigurezisaperspectiveviewofthennished P kage.

transversely placed marginal parts of the wrap- The fold a. which ispicked up out of the wrapping paper and in the figure lies below theplane of the drawing coincides, when the wrapping paper is being wrappedover the top edge of the carton, with the edge of the front wall of the5 carton.

The middle part of the fold a, which lies at the upper edge of the frontwall (Fig. 2) is the ripping tab. The lateral partsof the ripping tablie at the upper edge of the side walls and 10 are covered and securedby the downwardly folded ends b of the wrapping paper as shown in thefigure. The wrapping paper is secured in this position by the label c.

been torn in, which can easily be effected,the tab can be grippedbetween the thumb ball of the hand on one side and the other fingers ofthe hand on the other side and, by moving the gripping hand backwardscan be used for tear- 20 ing open that part of the wrapping, which liesabove the lid, and exposing the lid. i

It is already known for opening newspapers, wrappers and the like andfor opening the paper wrappings of packages, to provide tearing stripsconsisting of transverse pleats, and which extend transverselyover thewrapper or over the wrappingpi the package. In contradistinction theretothe present invention relates to an improvement ofthe known tearingdevices, consisting of 30.

a ripping tab arranged at the upper edge. of the front wall of the boxand open at the bottorn, by means of which the part of thewrapping'covering the top of the carton can be torn oil. I r

What I claim is: a

A device for ripping open the paper wrapping of cartons in the form ofprisms, for example, four-sided prisms, by means of a ripping tab,

gcharacterized by the feature that the ripping tab is formed by pickingup the surface of the wrapping paper and nipping it,andthatthe wrap-'ping paper is wrapped around the carton in such a manner that the tabextends downwards from the top edge of the front of the carton, the endsof said tab being folded round thefsides and covered by the parts of thewrapping paper which are folded downwardly from the top of the carton. v

smmnomf After the side edges of the ripping tab have 15 I

